Cooling System In The Power Supplies; Airflow Direction In The Ex9253 Switch Chassis - Juniper EX9253 Hardware Manual

(Continued)
Table 7: Fan Tray LED
Color State
Red On steadily

Cooling System in the Power Supplies

The power supplies are self-cooling and are installed in the rear panel of the switch. The exhaust for the
power supplies are also located on the rear of the chassis.

Airflow Direction in the EX9253 Switch Chassis

The switch has front-to-back (AIR OUT) airflow (see
chassis is located on the front of the chassis. Air is pulled through the chassis toward the fan tray, where
it is exhausted out through the rear of the chassis. The air intake to cool the power supplies is also
located in the front of the chassis.
Figure 12: Airflow Through the EX9253 Switch Chassis
Description
The fan tray is faulty and not functioning normally.
Figure 12 on page 26). The air intake to cool the
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